tip一词在英语中有一层意思是给予小费，据说它源于十八世纪初。那时，在英国伦敦的数学家咖啡馆里，都装有一个匣子，事忙的人往里边投几个小钱，就可以优先供应，并且匣子上还贴有To Insure Promptness（保证迅速供应），后来取这三个词的首字母组成tip，变成小费的意思。小费至今没有统一的标准。在美国大城市里，比较高级的餐馆或服务特别周到的地方，小费要付得慷慨。一般情况下，小费要占账单的百分之十五。如在提供一流服务的高级餐馆用餐，小费要占账单的百分之二十。而在一般的餐馆，如果是在餐馆的柜台前用餐，那就不须付小费，在离开时可在盘子旁边留下一、 The word tip has a meaning in English. It is said that it originated in the early eighteenth century. At that time, in the mathematician cafe in London, England, there was a guise. If the busy person casts a small amount of money, he can give priority to the supply, and To Insure Promptness is also attached to the casket. Later, taking the first letter of these three words to form tip meant to be a tip. There is no uniform standard for tips. In big cities in the United States, tips are generous for more advanced restaurants or services. In general, tipping accounts for 15 percent of the bill. If you are dining in a high-end restaurant that offers first-class service, tipping accounts for 20% of the bill. In a typical restaurant, if you are eating in front of the counter of the restaurant, you do not have to pay a tip. You can leave it next to the plate when you leave.